Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '9f0fbb8cb99665aebac56cd7b4ddeb379ae7f4e3bb1cd95268e4adbf6f5f3d1a' 
  AND token = '2gRQi0E2SEL6gPOSUKd0DhCuwwDXgB99Sa5f8PbZVco=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}